Quantum tunneling is a classically-forbidden quantum effect that allows a bound object with energy less than the boundary to penetrate it with a small probability. A notable example is $\alpha$-decay
Questions tagged [quantum-tunneling]
360 questions
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What happens when an electron, or a neutron, approaches a brick wall?
(I have looked through 100 questions tagged quantum tunneling before asking)
I know how to calculate quantum tunneling for a single particle in a given potential energy landscape in single-particle quantum mechanics. My question is, can such a…
Andrew Steane
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Does quantum tunnelling drill holes in solid state drives?
The solid state drive (SSD) consists of numerous data storage elements. Each element (NAND flash memory element) reminds me of a microscopic battery. An electron is supposed to enter the element through the oxide layer and remain inside. A…
GianniTee
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Is energy lost in an elastic tunneling process?
Suppose we had two metal plates separated by an Angstrom. Now, apply a voltage $V$ between the two metal plates. There will be a tunneling current $I$ between the metal plates.
Since $P=IV$, does that imply power is being dissipated by the system,…
ChickenGod
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Tunneling of Electrons
I just have a hypothetical question:
If we have two beams of electrons which have the same energy, they approach some potential barrier of same fixed height. One of the barriers have a width of $d$ and the other has a width of $2d.$
My conclusion…
Aurora Borealis
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Will the electrons flowing in a metal wire come out of it and even through non conducting insulation outside it due to quantum tunneling?
Lets imagine that electrons are passing through a conducting wire. According to quantum mechanics , each electron is in form of wave function . Does that wave function have a value above 0 even outside that wire(even near 0), including the non…
Apple_Banana
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Value of E1 or E2 in tunnelling diode current
I am trying to understand the meaning of the value E1,E2 in a tunnelling current expression derived in the following paper.
http://aip.scitation.org/doi/pdf/10.1063/1.1735965
A more succinct overview is given in Sze, Ng 2nd edition "Physics of…
daFireman
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Would a quantum tunneling cable be possible?
I watched a spacetime video on youtube:
https://www.youtube.com/watch?v=-IfmgyXs7z8 talking about how because of uncertainty, photons (and some small particles) can tunnel very small distances instantaneously to travel slightly further than a…
Snowybluesky
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Why we can't use quantum tunnelling still in nuclear fusion where sun uses this trick of nature easily?
Sun haven't enough temperature to break down coulomb barrier between two protons to be fussed.But yet nuclear fusion occurs through quantum tunnelling process.So,why we can't use quantum tunnelling in our nuclear fusion technology same as sun do…
Abu sayed
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Tunneling in classical mechanics
According to a classical mechanics a particle that do not have enough energy will not be able to surmount a potential barrier.
But what if we have a lot of particles(e.g. electrons)? They can interact with each other(Coulomb's law) and transfer…
Vlad
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Can't find any QTC (quantum tunneling composite)
As per the title, I can't find any QTC to buy online. I may be dumb or just looking in the wrong places. Is it that uncommon? Are there any places that sell it locally in Melbourne, or is it just online? Apologies if this is the wrong forum as this…
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What would be a probability of a silicon atom from the moon to quantum tunnel to earth?
What is the probability of a silicon atom going from the moon and landing on the Earth? The reason is that there is a barrier that the silicon atom has to cross which is the moon's own gravity so that it can enter a lower energy state. Is it…
MiltonTheMeme
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In quantum physics, apparently every "particle/wave" is capable of tunneling. Why then is there a shadow at all?
A layman's question: In quantum physics, apparently every "particle/wave" is capable of tunneling/passing through material. Why then is there a shadow at all?
Rainer
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Mathematical Proof of Decay in Tunneling with tunnel lenght L
Let us suppose we have a particle with energy $E$ and $EL$ (III) and
$U(x)=U$ for $0
seVenVo1d
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With such a low mass, how do enzymes use quantum tunneling to lower the activation energy in a reaction
The Sun uses quantum tunneling to create nuclear fusion, but only can achieve this through it's large mass. So how can enzymes in our body achieve this feat?
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How do enzymes use quantum tunneling (also, please use relatively simple vocabulary)?
I already know how the Sun uses quantum tunneling to create nuclear fusion, but can't apply it to enzymes. Also, since I'm only in eighth grade, please use relatively simple language. Thanks!